NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

25 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, last 30 days — NPA 858
ONVOY, LLC - CA 20
EXIANT COMMUNICATIONS LLC 2
PEERLESS NETWORK OF CALIFORNIA, LLC - CA 1
NEW CINGULAR WIRELESS PCS, LLC 1
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 1
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2021-02-17 858-305-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SNDG MRMS CA
2021-02-17 858-305-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SNDG MRMS CA
2021-02-17 858-305-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNDG MRMS CA
2021-02-16 858-727-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNDG SNDG CA
2021-02-15 858-306-0XXX 0000–0999Assigned TELNYX LLC 073H DEL MAR CA
2021-02-14 858-241-0XXX 0000–0999Assigned TELNYX LLC 073H LA JOLLA CA
2021-02-14 858-400-3XXX 3000–3999Assigned TELNYX LLC 073H RNCHOSANFE CA
2021-02-14 858-588-0XXX 0000–0999Assigned TELNYX LLC 073H RNCHOBRNDO CA
2021-02-11 858-298-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SNDG LVTA CA
2021-02-11 858-667-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SNDG LVTA CA
2021-02-11 858-667-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNDG LVTA CA
2021-02-11 858-832-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 RNCHOSANFE CA
2021-02-11 858-832-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 RNCHOSANFE CA
2021-02-11 858-899-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 EL CAJON CA
2021-02-11 858-899-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 EL CAJON CA
2021-02-11 858-899-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 EL CAJON CA
2021-02-11 858-955-0XXX 0000–0999Assigned TELNYX LLC 073H PINEVALLEY CA
2021-01-28 858-269-6XXX 6000–6999Assigned TELNYX LLC 073H POWAY CA
2021-01-27 858-216-3XXX 3000–3999Assigned TELNYX LLC 073H RNCHOPNQTS CA
2021-01-27 858-306-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 DEL MAR CA
2021-01-27 858-306-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 DEL MAR CA
2021-01-27 858-306-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 DEL MAR CA
2021-01-27 858-399-9XXX 9000–9999Assigned FRACTEL, LLC 965H CORONADO CA
2021-01-26 858-241-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H LA JOLLA CA
2021-01-26 858-241-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H LA JOLLA CA
2021-01-25 858-269-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 POWAY CA
2021-01-25 858-269-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 POWAY CA
2021-01-25 858-269-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 POWAY CA
2021-01-25 858-599-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 NATIONALCY CA
2021-01-25 858-599-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 NATIONALCY CA
2021-01-25 858-733-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 RNCHOPNQTS CA
2021-01-25 858-733-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 RNCHOPNQTS CA
2021-01-25 858-733-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 RNCHOPNQTS CA
2021-01-25 858-977-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 DEL MAR CA
2021-01-25 858-977-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 DEL MAR CA
2021-01-20 858-358-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F EL CAJON CA
2021-01-20 858-727-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C SNDG SNDG CA
2021-01-20 858-727-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SNDG SNDG CA
2021-01-20 858-727-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C SNDG SNDG CA
2021-01-13 858-588-8XXX 8000–8999Assigned FRACTEL, LLC 965H RNCHOBRNDO CA
2021-01-08 858-241-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LA JOLLA CA
2021-01-08 858-241-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LA JOLLA CA
2021-01-06 858-333-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LA JOLLA CA
2021-01-06 858-358-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 EL CAJON CA
2021-01-06 858-358-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 EL CAJON CA
2021-01-06 858-358-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 EL CAJON CA
2021-01-06 858-727-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNDG SNDG CA
2021-01-05 858-789-9XXX 9000–9999Assigned FRACTEL, LLC 965H SNDG SNDG CA
2021-01-05 858-899-9XXX 9000–9999Assigned FRACTEL, LLC 965H EL CAJON CA
2020-12-15 858-733-3XXX 3000–3999Assigned TERRA NOVA TELECOM INC. 145J RNCHOPNQTS CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.